USA, 2018

The report said internal documents from six Catholic dioceses in Pennsylvania -- some held in a secret archive to which only the bishop had a key -- showed that more than 300 "predator priests" have been credibly accused of sexually abusing more than 1,000 child victims.

The letter directly referred to the Pennsylvania report, which "detailed the experiences of at least 1,000 survivors, victims of sexual abuse, the abuse of power and of conscience at the hands of priests over a period of approximately 70 years."

Looking ahead, the pontiff said the church was working on a "zero tolerance" policy on abuse and coverups. He added, "If, in the past, the response was one of omission, today we want solidarity, in the deepest and most challenging sense, to become our way of forging present and future history."

A month earlier, McCarrick issued a statement saying he was shocked by the allegations: "While I have absolutely no recollection of this reported abuse, and believe in my innocence, I am sorry for the pain the person who brought the charges has gone through, as well as for the scandal such charges cause our people."

McCarrick was also accused three times of sexual misconduct with adults "decades ago" while he served as a bishop in Metuchen and Newark, New Jersey, the current bishops of those cities said in June. Two of those allegations resulted in settlements, the bishops said.

The Vatican said Pope Francis had ordered McCarrick to "a life of prayer and penance until the accusations made against him are examined in a regular canonical trial."

Chile, 2018

Pope Francis called the country's bishops to Rome in May after he received a 2,300-page report detailing sexual abuses by priests in Chile.

The report alleged that for decades, church officials in Chile had known about cases of sexual abuse and led a massive cover up, even destroying records.

Seven years earlier, the Vatican had found Chilean priest Father Fernando Karadima guilty of child sex abuse.

In January, while visiting Chile, Francis defended a Chilean bishop accused of concealing the abuse, saying he had been "slandered."

But after Vatican investigators said church officials in Chile had helped cover up multiple cases of sexual abuse by the clergy, the Pope apologized.

Australia, 2017

Cardinal George Pell,
one of the most senior members of the Catholic Church, was charged with multiple historical sexual assault offenses in his home country of Australia, police said in June.

Pell serves as a top adviser to Pope Francis and heads the Vatican's secretariat for the economy. In 2013, he was named one of eight cardinals tasked with investigating ways to reform the church. He is the most senior member of the Catholic Church in Australia but has been placed on leave from the Vatican while the allegations are investigated.

Pell said he's innocent and maintains that the charges -- relating to claims of sexual abuse spanning three decades -- are false.

In a statement, the Vatican
said: "The Holy See has taken note of the decision issued by judicial authorities in Australia regarding His Eminence Cardinal George Pell. Last year, the Holy Father granted Cardinal Pell a leave of absence so he could defend himself from the accusations. The leave of absence is still in place."

A 2017 commission found
that 7% of Australian priests were accused of abusing children between 1950 and 2015.

Dominican Republic, 2014

Jozef Wesolowski, a former Vatican ambassador to the Dominican Republic was found guilty of sexual abuse
of minors by a Vatican tribunal and defrocked in 2014. He was accused of sexual abuse of minors and possession of child pornography during his time as papal nuncio to the Dominican Republic. Italy's Corriere della Sera reported that Wesolowski's laptop contained more than 100,000 files with pornographic images and videos.

Wesolowski was the highest-ranking Catholic official arrested for alleged sexual abuse of minors. He died in 2015,
before he could be put on trial.

The Netherlands, 2011

Thousands of children suffered from sexual abuse in the Dutch Roman Catholic Church
over more than six decades, and about 800 "possible perpetrators" have been identified, according to an independent Commission of Inquiry, issued in 2011.

The commission said it received 1,795 reports of church-related sex abuse of minors and the "reports contained information about possible perpetrators."

Multiple countries, 2010

Allegations of sexual abuse
spread across a half dozen countries -- including Austria, Germany, the Netherlands, Spain, Switzerland and Brazil, home of the world's largest Catholic population.

Revelations about church abuse included the Munich, Germany, archdiocese where Pope Benedict XVI once served as archbishop.

Under the Pope's tenure as archbishop in the early 1980s, the Munich archdiocese ignored warnings to keep a molesting priest away from children, said the doctor, Werner Huth, who issued those warnings.

Huth demanded the priest, Rev. Peter Hullermann, never be allowed to interact with children again. Instead, the church allowed the priest to return to work and to deal with children. Hullermann was convicted of abusing minors in 1986. Pope Benedict had left the Munich archdiocese for a new post in 1982.

Ireland, 2009

The Dublin Archdiocese Commission of Investigation's 720-page report said that it has "no doubt that clerical child sexual abuse was covered up" from January 1975 to May 2004, the time covered by the report. The commission had been set up in 2006 to look into allegations of child sexual abuse made against clergy in the Irish capital.

The report named 11 priests who had pleaded guilty to or were convicted of sexual assaults on children. Of the other 35, it gave pseudonyms to 33 of them and redacted the names of two.

USA, 2004

Children accused more than 4,000 priests of sexual abuse between 1950 and 2002, according to a report compiled
by the John Jay College of Criminal Justice.

The report, based on church records, found that 6,700 of the 11,000 allegations were investigated and substantiated, and another 1,000 were unsubstantiated. The remaining 3,300 were not investigated because the priests involved had died by the time the allegation was made.

USA, 2002

Former priest John Geoghan became a central figure in the clergy sexual abuse crisis in Boston, along with Cardinal Bernard Law, who admitted receiving a letter in 1984 outlining allegations of child molestation against Geoghan. Law assigned Geoghan to another parish despite the allegations.

From 1962 to 1995, Geoghan sexually abused approximately 130 people, mostly grammar school boys, according to victims. Over the years, church officials ordered him to get treatment or transferred him to other parishes, but kept him on as a priest. The Boston Globe coverage on sexual abuse by clergy brought the issue to the forefront. The story was later adapted into the award-winning movie "Spotlight."

Geoghan was found guilty of molesting a boy
in a swimming pool and sentenced to prison in 2002. A year later, he died after an attack by another inmate at the state prison.

Law resigned as archbishop of Boston in 2002.

In 2004, Archbishop Sean O'Malley
issued a statement saying that 815 people had made claims of sex abuse of a minor by a priest and 150 people had made claims against a deacon, non-incardinated, or religious order priest between 1950 and 2003.

In 2011, O'Malley published the names of 159 clerics
accused of sexual assault over that time period. The names of an additional 91 clerics who had been accused were not included for reasons including their deaths before the completion of inquiries when they had not been publicly accused.

Austria, 1998

Cardinal Hans Hermann Groër of Vienna was forced to give up all his duties amid allegations he molested young boys. A statement by Groer asked for forgiveness but made no admission of guilt, reported the BBC.

USA, 1985

Father Thomas Doyle warned of sexual abuse by clergy in a report given at the US conference of bishops. It was ignored.

Gilbert Gauthe in Louisiana became the first to gain national attention in a case of a priest accused of sexual abuse. In 1985, he admitted to abusing 37 boys and pleaded guilty to 34 criminal counts, reported the New York Times.
He was sentenced to 20 years in prison, but released after 10 years.